I never consider accuracy in thr equation concerning concealed carry. It's not about being accurate because the would be assailant is very close in 99% of any situation you might encounter.
I'm only concerned with firepower.
I want to only use one round, possibly 2 because there would be no time to second guess. Consequently, the only choice for me (and my wife) is our 45-410 derringers. Light, fits in your pocket with no holster or you can holster it if you desire. We typically chamber a 45 Colt in the upper bore and a No.8 shotshell in the lower. The 45 Colt is a tad bit below the 44 magnum in kinetic bullet energy so if the 45 Colt don't do it, there is the No.8 shot.
You aren't going to get multiple shots in most situations anyway. Why not have the firepower and the knockdown power in the first shot.
Makes no sense to me to carry anything else, not that I ever consider the use of deadly force in the first place. It's merely an option, however...
I have a number of handguns that I can carry, but the 2 shot derringer is my overall choice for convenience.
'An armed society is a polite society'........